In regards to fixing a leaking tap, nine times out of ten this is not always down to a manufacturing fault, but a minor issue that can be dealt with very easily and very quickly by yourself at home.
Many taps during production can end up with a small amount of grit or silt residue left inside, which is not always successfully removed when they are tested for performance. During the installation of your taps, your plumber as part of the installation process should flush the taps through to eliminate any silt or grit that may be residing in the tap to prevent having to fix a leaking tap later on. If this part of the installation process is missed, it can commonly cause a tap to form a slight drip.
To Fix Your Leaking Tap You Must Flush Out Any Debris
If there is limescale present, a small amount of vinegar can do wonders in removing it. Simply soak the tap in cold water with a small amount of vinegar for a quick fix.